How many grams of NH3 can be prepared from 77.3 grams of N2 and 14.2 grams of H2? (Hint: Write and balance the equation first.) (a) 93.9 g (b) 79.7 g (c) 47.0 g (d) 120.0 g (e) 13.3 g 16. Silicon carbide, an abrasive, is made by the reaction of silicon dioxide with graphite. SiO2 +3C SIC + 2CO If 100 g of SiO2 and 100 g of C are reacted as far as possible, which one of the following statements will be correct? (a) 111 g of SiO2 will be left over. (b) 44 g of SiO2 will be left over. (c) 82 g of C will be left over. (d) 40 g of C will be left over. (e) Both reactants will be consumed completely, with none of either left over